Datasheet
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SBAS274H − MARCH 2003 − REVISED MAY 2007
www.ti.com
7
PIN ASSIGNMENTS
TQFP PACKAGE
(TOP VIEW)
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
FIFO_LEV[2] (ADS1606 Only)
FIFO_LEV[1] (ADS1606 Only)
FIFO_LEV[0] (ADS1606 Only)
NC
DOUT[15]
DOUT[14]
DOUT[13]
DOUT[12]
DOUT[11]
DOUT[10]
DOUT[9]
DOUT[8]
DOUT[7]
DOUT[6]
DOUT[5]
DOUT[4]
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
AGND
AVDD
AGND
AINN
AINP
AGND
AVDD
RBIAS
AGND
AVDD
AGND
AVDD
REFEN
NC
2XMODE
NC
VREFP
VREFP
VMID
VREFN
VREFN
VCAP
AVDD
AGND
CLK
AGND
DGND
IOVDD
DVDD
DGND
NC
NC
PD
DVDD
DGND
RESET
CS
RD
OTR
DRDY
DGND
DVDD
NC
NC
DOUT[0]
DOUT[1]
DOUT[2]
DOUT[3]
64 63 62 61 60 59 58 57 56 55 54
17 18 19 20 21 22 23 24 25 26 27
53 52 51 50 49
28 29 30 31 32
ADS1605
ADS1606
PowerPAD
TM
Terminal Functions
TERMINAL
NAME NO.
TYPE DESCRIPTION
AGND 1, 3, 6, 9, 11, 55, 57 Analog Analog ground
AVDD 2, 7, 10, 12, 58 Analog Analog supply
AINN 4 Analog input Negative analog input
AINP 5 Analog input Positive analog input
RBIAS 8 Analog Terminal for external analog bias setting resistor
REFEN 13 Digital input: active low Internal reference enable. Internal pull-down resistor of 170kΩ to DGND.
NC 14,16, 27, 28, 45, 50 Not connected These terminals are not connected within the ADS1605/6 and must be left
unconnected.
2XMODE 15 Digital input Digital filter decimation rate. Internal pull-down resistor of 170kΩ to DGND.
PD 17 Digital input: active low Power down all circuitry. Internal pull-up resistor of 170kΩ to DGND.
DVDD 18, 26, 52 Digital Digital supply
DGND 19, 25, 51, 54 Digital Digital ground
RESET 20 Digital input: active low Reset digital filter
CS 21 Digital input: active low Chip select
RD 22 Digital input: active low Read enable
OTR 23 Digital output Analog inputs out of range
DRDY 24 Digital output: active low Data ready on falling edge
DOUT [15:0] 29−44 Digital output Data output. DOUT[15] is the MSB and DOUT[0] is the LSB.
FIFO_LEV[2:0] 46−48 Digital input FIFO level (for the ADS1606 only). FIFO_LEV[2] is MSB.
NOTE: These terminals must be left disconnected on the ADS1605.
IOVDD 53 Digital Digital I/O supply
CLK 56 Digital input Clock input
VCAP 59 Analog Terminal for external bypass capacitor connection to internal bias voltage
VREFN 60, 61 Analog Negative reference voltage
VMID 62 Analog Midpoint voltage
VREFP 63, 64 Analog Positive reference voltage